Stone or rock channeling machine.



A. BALL.

B'I'ONE OR BOOK GHANNELING MAGHINE.

APPLIGATIOH TILED P33. 8, 1907.

Patented July 6, 1909. 2 SHEETS-SHEET 1.

If an; eases.

Inventor. fllber't Ball.

. ALL.

STONE 0R BOOK NNELING MACHINE.

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927,444. Patented July 6, 1909.

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/ i Z A fill "NW Witnesses. Invenior. 01m 0. $74k. 12 211.21: Ball.

UNITED STATESjiIENT OFFICE.

ALBERT BALL, OF ULAREMONT, NEW HAMPSHIRE, ASSIGNOR TO SULLIVAN MACHINERY COMPANY, OF CLAREMONT,

NEW HAMPSHIRE, A CORPORATION OF MAINE.

STONE OR ROCK GHANNELING MACHINE.

Specification of Letters Patent.

Patented July 6, 1909.

To all whom it may concern:

Be it known that I, ALBERT BALL, a citizen of the United States, residing in Claremont, in the county of Sullivan and State of New Hampshire, have invented an Improvement in Stone or Book Channeling Machines, of which the following description, in connection with the accompanying drawings, is a specification, like numerals on the drawings re resenting like arts.

y invention re ates to stone or rock channeling machines and more particularly to improved means for effecting rigidity between the feed bar and engine.

As hitherto constructed, machines of this type are usually provided with a feed bar connected to the c anneling engine by which the position of the latter and the bits operated thereby are regulated for effectively cutting the desired depth of channel in the stone or rock operated upon. In operating with these engmes, the constant jar and shock or vibration continually transmitted to the feed bar and its connection with the feed or top plate of the machine has caused the feed bar to work loose, which has seriously interfered with and impaired the effective work of the machine.

My invention aims, generally, to overcome this ob'ection by providing improved connections etween the feed bar and the eng ne. 0

hese lmprovements consist of simple but effective means for maintaining rigid contact and preventing relative movement between the feed bar and the engine cylin.der,'which is of vital importance and essential to the effective operation of the machine.

My invention, however, will be best understood and appreciated by reference to the following description, when taken in connection with the accompanying drawings of an embodiment of my invention selected for purposes of illustration, its scope being more particularly pointed out in the appended claims.

In the drawings: Figure 1, is an end view, partly in section, of a portion of a channeling machine, its supporting standard, and the mechanism for driving the same; Fig. 2, a de-- tail, in partial section and elevation, of the feed late and the connected and of the feed bar; ig. 3, a bottom plan of said plate; Fig. 4, a detail showing a feed bar having a slightly modified form of head; Fig. 5, an end view or Ian of said head; Figs. 6 and 7, are sectiona details of modified forms of heads showing the manner of connecting the feed and top plates therewith; Fig. 8, a horizontal section on line 8-8, Fig. 6, showing the dowel pin to be referred to, in dotted lines: Figs. 9 and 10, a half plan and corresponding vertical section of the top plate and modified construction of feed plate secured thereon, and Fig. 11 the head of a feed bar adapted to be secured thereto.

Referrin to the drawings, Fig. 1 and to the particu ar embodiment of my invention therein selected for purposes of illustration only, I have shown my improvements in connection with a typical commercial channeling machine of well known construction though obviously any machine of that class that is provided with an engine moved by a feed bar to a desired position, may be employed.

In the machine shown, 1 represents the engine, and 2 the rociprocatin cross head connected therewith, both s-lida ly mounted in the side guides 3 secured to the supporting. standard 4, the action of the engine reciprocating the cross head vertically to drive the bits 5 down for each cut of the machine. In the present instance, the engine is fed downwardly, or moved step by step,by the action of a feed bar 5, Fig. 1, which is operated in a manner common to machines of this type, by the rotation of a feed nut 6, secured to a pinion 7, and driven by a horizontal pinion B on a shaft 9 having at its outer end a hand or sprocket wheel 10 by which it may be turned. The head of the engine cylinder is provided with what is termed a top plate, 11, to which is bolted a feed late 12, the feed bar 5 having an enlarged cy indrical head 13, Fig. 1, recessed into or between said plates and clamped and held rigidly in position by the cylinder bolts 14.

Referring now to Fig. 2, I show the feed bar as provided with an enlarged flat cylindrical head 13 the adjacent end or connected portions of the feed bar being here shown as aving a plain surface or unprovided with screw threads, so that there are no threads to be cut away or be broken at those portions of the bar that are connected with the feed plate. The feed plate 12 has a central aperture 15, Fig. 3, enlar ed concentrically at the under side of said p ate to form a cylindrical recess 16 of the same diameter as the enlarged cylindrical head 18 of said feed bar and in which the latter is placed in securing the feed bar in position, said head forming a very close fit therewith and necessitating its being forcibly driven into position. The thickness of the head 13 is slightly greater than the depth of the enlarged cylindrical recess 16 on the under side of the feed plate so that the head 13 projects below it. To receive this rojecting portion of said head, the face of tfie top plate is centrally provided with a shallow circular socket or recess 17 of the same dimensions, this recess 17 and that on the under side of the feed plate, together forming a single recess to receive the head 13 of said feed bar and hold it firmly in place. When the feed bar and its feed plate are placed in osition upon the top I plate and the cylinder olts set u a strong rigid connection is made, the en arged cylindrical head presenting large bearingsurfaces that engage the bearing or side walls of the cylindrical recess formed in said plates and preventing any longitudinal movement of said bar relative to either of said lates and thus rigidly hold it in place. Suc construction also prevents any lateral vibration or wabbling movement thereby eliminating any tendency of the feed bar to work loose. To revent turning or rotary motion of the fee( bar in its recess, suitable means are also employed. To this end, and in the construction shown in Figs. 2 and 3, I preferabl provide the edge of the enlarged cylindrica head 13 with a groove 18 and the adjacent curved wall of the feed late with a similar groove 19, the two toget er constituting a recess to receive a'dowel pin or key 20. When this key is inserted and driven home the feed late 12 and said head 13 are more rigidly old in contact and secured together and turning or rotary movement of one relative to the other is absolutely prevented. By this arrangement, the head of the feed bar and the top of the feed plate are integrally secured together, the large bearin surfaces of said head and the enga ing wa ls of the recess taking up and distri uting the 'ar of the machine and preventing any relative movement of said head, either longitudinal, lateral or rotative.

The dowel pin or key 20 and the recess in which it is placed, may obviously be of any desired shape or construction, but in the resent instance are referably made circuar, as shown best in lfiig. 3.

In the construction shown by Figs. 4 and 5, the head of the feed bar intermediate its enlarged head 13 and the screw threads above the feed bar has a reduced or down-turned portion 21, that fits somewhat loosely in the central opening 15 in the feed plate, so that vibrations transmitted through the feed bar 5 shall be axial rather than superficial and hence diminish the jar brought on the screw threads so far as possible. The head 13 of this bar is also provided with a longitudinal groove 18, to which reference has been made, which here and in the plan view in Fig. 5 is shown as semicircular as is the complemental groove 19 in the head of the feed plate. The groove 18 and dowel pin or key 20 which prevent turning movement of the feed bar may obviously be placed at either or any desired side of the feed bar or upon either its upper or lower surface, and the groove 19 in the adjacent wall of the recess in said plates as, for exam le, at the under side of said head 13, as S10WI1 in Figs. 6 and 8. In the latter case, the top )late 12 of the cylinder, not only has a cylindrical socket or recess 17, as in the form described, but the bottom wall thereof is provided with a horizontal or diametrical groove 22 to receive a key or dowel pin 23, the o posed flat face of the head 13 seated in said recess 17, being also provided with a diametrical groove 24 to receive a portion of said dowel pin 23. By this construction, the feed bar head 13 being turned to proper position and then driven home to its seat in the feed plate, is brought down upon the dowel pin 23 and the clamping cylinder bolts set up to clamp the plates rigidly together and the key or dowel pin 23 into its receiving grooves, which revent any turning movement of said head 11 some instances, I have found it desirable to provide the end of the feed bar just above its enlar ed head 13, Fig. 7, with taper threads 25, w ich gives slightly increased holding surface for securing the same in place and it may obviousl be used with eflicient results. To avoid tfie necessity of having a multiplicity of parts, I have also found that by providin the cylindrical head 13 with a dowel-pin-li e projection and the feed plate recess with a corresponding or complement-a1 groove, the same results may be secured as y separately providing opposed grooves 18 and 19 and a dowel pin 20. Thisconstruction is shown in the form of my invention illustrated b Figs. 9 to 11, the latter showing the enlarge cylindrical head 13 of the feed bar as provided with a radial rib or projection 26, which closely fits into a vertical groove 27 in the Wall of the recess 16 in said feed plate 12, the top surface 28 of the top plate, in this instance, being flush with the under surface of the feed plate and the head 13 of the feed bar recessed entirely into the feed late. This construction also prevents any ongitudinal or lateral movement or turning movement of the feed bar relative to said plates and thereb prevents it from working loose during the operation of the machine.

By my invention I have provided very simple and effective means for rendering the connections between the feed bar and the top plate or engine rigid and secure, preventing the feed bar from working loose during continued operation of the machine and thus greatly enhancing its efficiency.

My invention, obviously, is not limited to the particular embodiment herein selected for purposes of illustration only, nor to the specific details of construction and arrangement, it being understood, that the same may be modified within wide limits without departing from the spirit and scope thereof.

I claim:

1. In a machine of the type described, the combination of an engine cylinder, a cross head driven thereby, provided with a channeling tool or tools, side guides for directing the movement of said engine and cross head vertically, with a top late, at the head of said cylinder, a feed p ate secured thereto, said plates having a bearing recess formed between their opposite faces, a part being formed in each, the recess in said feed plate having a central opening communicating therewith, and a feed bar having an enlarged bearing head seated in and engaging the walls of said recess with its shank extending through said opening, the enlarged bearing head ui'on the feed bar closely and accurately fitting the bearing recesses formed in said feed and top plates at all circumferential points without freedom for lost movement in either of said plates, whereby longitudinal movement of said bar relative to either of said plates is prevented and means for preventing rotary motion of said enlarged head in said recess, said means comprising interlocking means intermediate said head and a groove formed in an adjacent wall of said recess.

2. In a machine of the type described, the combination of an engine cylinder, a cross head driven thereby, provided with a channeling tool or tools, side guides for directing the movement of said engine and cross head vertically, with a to plate, at the head of said cylinder, a fee late secured thereto, said plates having a bearing recess formed between their op osite faces, a part being formed in each, t e recess in said feed plate having a central opening communicating therewith, and a feed bar having an enlarged bearing head seated in and engaging the walls of said recess with its shank extending through said opening, the portion of the feed plate immediately surrounding said central opening affording a shoulder to engage the upper face of the bearing head of the feed bar, the enlarged bearing head upon the feed bar closely and accurately fitting the bearing recesses formed in said feed and to plates at all circumferential points without freedom for lost movement in either of said plates, whereby longitudinal movement of said bar relative to either of said plates is prevented, and means for preventing rotary motion of said enlarged head in said recess, said means comprising interlocking means intermediate said head and a groove formed in an adja- 1 cent wall of said recess.

3. In a machine of the type described, the combination of an engine cylinder, a cross head driven thereby, provided with a channeling tool or tools, side guides for directing the movement of said engine and cross head vertically, with a top late, at the head of said plates having a caring recess formed between their opposite faces, a part being formed in each, the recess in said feed plate having a central opening communicating therewith, and a feed screw threaded bar having an enlarged bearing head seated in and engaging the walls of said recess with its shank extending through said 0 ening, the portion of the feed plate imme iately surrounding said central opening affording a shoulder to engage the upper face of the bearing head of the feed bar, the portion of the bar above its enlarged head being reduced to fit loosely in the said opening to diminish the jar upon the screw threads of the feed bar, the enlarged bearing head upon the feed bar closely and accurately fitting the bearing recesses formed in said feed and top plates at all circumferential points without freedom for lost movement in either of said plates, whereby the longitudinal movement of said bar relative to either of said plates is prevented, and means for preventing rotary motion of said enlarged head in said recess, said means comprising interlocking means intermediate said head and a groove formed in an adacent wall of said recess.

4. In a channeling machine having an engine cylinder with its cooperating piston and channeling tool or tools attached thereto, a feed plate having an opening enlarged at its underside to form an abruptly shouldered recess, a feed bar having an enlarged cylindrical bearing head of such cross-sectional dimensions as to fit closely the enlarged rccess and having its shouldered portion ongaging the shouldered portion of the recess, and means for clamping the feed plate to the end of the cylinder to bring the lower side of the cylindrical bearing head into forcible abutment against a part carried by the cylinder thereby to secure the feed bar against longitudinal displacement.

5. In a channeling machine having an engine cylinder with its cooperating piston and channeling tool or tools attached thereto, a feed plate having an opening enlarged at its underside to form a shouldered recess, a feed in said recess,means for clamping the feed plate to the end of the cylinder to bring the enlarged bearing head. into abutment against a part carried by the cylinder to prevent longitudinal displacement of the head in its said cylinder, a feed ate secured thereto,

bar having an enlarged bearing head seated recess, and means also for preventing turn mg movement of the head.

6. In a channeling machine having an engine cylinder provided with its cooperating piston and channeling tool or tools attached thereto, a feed bar for feeding said cylinder toward or away from the Work, said feed bar having an enlarged bearing head at its lower end, a feed plate through which said feed bar passes, said late having an enlarged recess at its underside to seat said enlarged bearing head. and means for clamping the feed plate to the cylinder, said cylinder presenting at its end a Wall portion brought into forcible abutment against the enlarged bearing head by the clamping action to hold the head firm to its seat within the feed plate.

In testimony whereof, I have signed my name to this specification, in the presence of i two subscribing witnesses.

ALBERT BALL.

"itnosses E. J. BURCIIARI). J. A. Bmion. 

